Four bulking agents—white wheat fiber, polydextrose, isomalt and oligofructose—were evaluated for usable energy values using young rats as the test model. The net increase observed in their carcass energy due to bulking agents fed over a 3‐wk period was evaluated. Wheat fiber contained 0.9, polydextrose 0.8, isomalt 1.6, and oligofructose 1.5 calories/g. As a partial substitute for sugar, fat and/or flour, these bulking agents could effectively reduce the energy content of foods.
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Ranhotra et al. (1993) studied this question.
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